Ok, Aaron went from having some of the worst instincts from a CF in the game (2002) to being a Gold Glover? Seriously?
Reality being what it is, Aaron brings the following to the table: good jumps, average closing speed, average at best hands, above average arm strenght but mediocre accuracy. He has improved and now is a good def. outfielder. But not a Gold Glover - there is nothing he is great at. Watch Hunter, Andruw, younger Edmonds play and you'll see what I am talking about.
Griffey? Could still be a decent corner OF, but, man, is it going to be scary watching him dive/bang, knowing that some 40 Million are on the line.